First Investigations for the Entrance System / Energy Analyzer of the PLASTIC Sensor on STEREO

Details First Investigations for the Entrance System / Energy Analyzer of the PLASTIC Sensor on STEREO First Investigations for the Entrance System / Energy Analyzer of the PLASTIC Sensor on STEREO

Dec 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001agufmsh31b0716a&link_type=abstract

American Geophysical Union, Fall Meeting 2001, abstract #SH31B-0716

Physics

2194 Instruments And Techniques

Scientific paper

STEREO (Solar TErrestrial Relations Observatory) is the third of five Solar-Terrestrial Probes that will accomplish the goals of the international Sun-Earth Connections program. PLASTIC (PLAsma and SupraThermal Ion Composition) consists of a top-hat E/q analyzer and a Time-Of-Flight--Energy (TOF--E) section. This sensor realizes three functions: a) charge-state and mass measurements of interplanetary ions with a 360o field of view in the ecliptic plane, b) charge-state, mass, and energy measurements of the solar wind (SW) heavy (Z > 2) ions in the 45o centered on the SW direction and +/- 20o out of the ecliptic plane, and c) charge-state, mass, and energy measurements of the solar wind protons and alpha particles by a separate low-gain entrance with the same field of view as in b). This way, PLASTIC will cover a large dynamical range from bulk solar wind protons to suprathermal particles. In order to accomplish the three functions, the entrance system consists of a complex geometry involving multiple toroidal sections. The use of protruding deflection plates allows to scan for directions up to +/- 20o out of the ecliptic plane. We will present the results of our first measurements with the laboratory prototype and compare them with the electrostatic simulations.

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